If you already have the outline applied, you can protect the worksheet in code
(auto_open/workbook_open??).

Option Explicit
Sub auto_open()
With Worksheets("sheet1")
.Protect Password:="hi", userinterfaceonly:=True
.EnableOutlining = True
End With
End Sub

It needs to be reset each time you open the workbook. (excel doesn't remember
it after closing the workbook.)



biometris wrote:

When protecting a worksheet containing outline data (grouped rows), the
expand/collaps buttons in the margin get unaccessible. Is using outline data
in protected sheets really impossible?

--

Dave Peterson